Collapsible connected crank having internal pressure springs

Abstract

The present invention includes two rotatable sleeves, two springs, two pins, two plastic sleeves and a Z-shaped crank. The two springs are respectively disposed in the two rotatable sleeves. The two rotatable sleeves are respectively accommodated around corresponding left end and right end of the crank. One end of each of the two springs is abuttingly connected on an inner wall of one of the two rotatable sleeves and one other end abuttingly connected on an end wall of the crank. The two pins are respectively penetrated through the two rotatable sleeves and are insertingly connected on the crank. The two plastic sleeves are respectively accommodated around left and right ends of the crank to closely cover the two pins. Thus, the present invention not only provides a smooth and pleasant appearance, but also allows a pedal to a position parallel to a bicycle without affecting a boxing effect.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a collapsible connected crank having internal pressure springs.BACKGROUND OF THE INVENTION[0002]The manufacturing of connected cranks has long inherited conventional appearance designs and craft. With respect to an installation position of a pedal, a position at an end of a crank is flattened, drilled and tapped to manufacture pedal holes having tooth patterns (½*20). As such, when a bicycle is completely assembled and boxed, pedals cannot be directly installed, otherwise the pedals will protrude from two sides of an outer box accommodating the bicycle, hence affecting the boxing process and the overall outer appearance and volume of a carton container. The pedals are then assembled by a client or a specialist after the client purchases the bicycle. Further, a risk of an assembly failure at the client end may be caused due to defective tooth patterns.[0003]Therefore, there is a need for a solution for improving prior art t...

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